
function [lp,hp]= frespondSingle(N,filterLen)
    w =  dbaux(filterLen);
    [lpd,hpd,lpr,hpr] = orthfilt(w); 

    vecLp = zeros(1,N);
    vecHp = zeros(1,N);
    vecLp(1:(filterLen*2)) = lpd;
    vecHp(1:(filterLen*2)) = hpd*(-1) ;
    
    lp = fftshift( fft(vecLp));
    hp = fftshift(fft(vecHp));
end 
    